best line with KK here?

[OXIO]

Over 82 hands Villain is 29.27/8.54/6.5

Whats the best line here? Do i raise him up big? What if he goes all in?

Party Poker No-Limit Hold'em, $ BB (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

SB ($21.68)
BB ($23.90)
UTG ($33.30)
UTG+1 ($25)
UTG+2 ($6.70)
MP1 ($8.63)
Hero ($86.60)
MP3 ($12.25)
CO ($64.55)
Button ($6.44)

Preflop: Hero is MP2 with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $0.10.
<font color="#CC3333">UTG raises to $0.5</font>, <font color="#666666">1 fold</font>, UTG+2 calls $0.50, MP1 calls $0.50, <font color="#CC3333">Hero raises to $4</font>, <font color="#666666">5 folds</font>, UTG calls $3.50, UTG+2 folds, MP1 folds.

Flop: ($9.35) J[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets $5</font>, <font color="#CC3333">Hero???</font>